Nobody runs a quarterback keeper quite like Dak Prescott.
When he gets a starting quarterback job, he keeps it.
It happened at Haughton (La.) High School, after starter Matt Smith suffered a broken finger on his throwing hand.
It happened at Mississippi State, after starter Tyler Russell sustained a concussion in the 2013 opener.
And now, as a Dallas Cowboys rookie, Prescott was rushed into action because of Tony Romo’s back injury and has only tightened his grip on the starting job.
At 4-1, the Cowboys already have matched last season’s win total. They play at Green Bay on Sunday, and Prescott, a fourth-round draft pick, will be in the...